v3.26.3
Derivative Financial Instruments - Schedule of Notional Amount and Fair Value Derivative Financial Instruments (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Derivative [Line Items]    
Asset derivatives, notional amount $ 311,963 $ 286,493
Total asset derivatives 1,174 789
Liability derivatives, notional amount 0 33,882
Total liability derivatives 0 70
Designated as Hedging Instrument [Member]    
Derivative [Line Items]    
Asset derivatives, notional amount 258,459 259,466
Asset derivatives designated as hedging instruments 543 316
Not Designated as Hedging Instrument [Member]    
Derivative [Line Items]    
Asset derivatives, notional amount 53,504 27,027
Asset derivatives not designated as hedging instruments 631 473
Liability derivatives, notional amount 0 33,882
Liability derivatives not designated as hedging instruments 0 70
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member]    
Derivative [Line Items]    
Asset derivatives, notional amount 8,459 9,466
Asset derivatives designated as hedging instruments 543 316
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]    
Derivative [Line Items]    
Asset derivatives, notional amount 250,000 250,000
Asset derivatives designated as hedging instruments 0 0
Other Assets [Member] | Not Designated as Hedging Instrument [Member]    
Derivative [Line Items]    
Asset derivatives, notional amount 30,363 0
Asset derivatives not designated as hedging instruments 588 0
Other Assets [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments [Member]    
Derivative [Line Items]    
Asset derivatives, notional amount 20,800 23,046
Asset derivatives not designated as hedging instruments 30 458
Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]    
Derivative [Line Items]    
Liability derivatives, notional amount 0 33,882
Liability derivatives not designated as hedging instruments 0 70
Interest Rate Swap Contracts [Member] | Other Assets [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Hedged Commercial Loans [Member]    
Derivative [Line Items]    
Asset derivatives, notional amount 8,459 9,466
Asset derivatives designated as hedging instruments 543 316
Interest Rate Swap Contracts [Member] | Other Assets [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Hedged Commercial Loans Federal Home Loan Bank [Member]    
Derivative [Line Items]    
Asset derivatives, notional amount 250,000 250,000
Asset derivatives designated as hedging instruments 0 0
Forward Loan Sale Commitments [Member] | Other Assets [Member] | Not Designated as Hedging Instrument [Member]    
Derivative [Line Items]    
Asset derivatives, notional amount 2,341 3,981
Asset derivatives not designated as hedging instruments $ 13 $ 15